National Doughnut Day commemorates the “donut lassies,” female Salvation Army volunteers who mended clothes and served home-cooked meals, including doughnuts, to American soldiers during World War I. The Salvation Army marked the day during the Great Depression as a way to raise money and spread awareness about its social service programs.

Take a look at some of the doughnut deals on Friday:

Dunkin' Donuts Get a free doughnut with the purchase of a drink at participating stores nationwide.

Krispy Kreme Pick up one free doughnut of your choice, with no purchase necessary, at participating stores in the U.S. and Canada. The freebie is not available in Connecticut.

Shipley Do-Nuts Get one free glazed donut, with no purchase necessary, at the southern chain's participating locations from 5 a.m. to noon.

Entenmann's Enter the sweepstakes to win free doughnuts for a year and other prizes. No purchase necessary.

Honey Dew DonutsGet a free doughnut if you purchase any medium or larger drink at participating locations of this New England chain.

LaMar's Donuts The midwestern chain is giving away one free doughnut "with a hole." No purchase is necessary.